A Registered EKG Specialist (RES) is classified among cardiovascular technicians, and healthcare professionals specializing in administering tests on the cardiovascular system to identify electrical conduction rhythms. Proficiency in various EKG/ECG machines, along with a foundational comprehension of arrhythmia interpretation, telemetry, non-invasive stress testing, and the recognition of myocardial infarction (MI), is imperative for individuals in this role.